Quite numerous: Connacht, Limerick-Clare etc. Ir. Ó h-Eaghráin, from the first name Eaghra. Woulfe says this is a Galway name. Also as Haren, Harhen. Both have been changed to Horan which is much more common. See also Harron. SI.

Haren:

fairly rare: scattered. See Haran.

Harron:

fairly numerous: Ulster etc. Ir. Ó h-Earáin, earadh, fear. A sept of Oriel in E Armagh. MacLysaght mentions an erenagh family Ó h-Aráin in Fermanagh which might account for their strong representation there now. See also Haran. SI.